Influence of Se and Te substitutions at Tl-site of Tl(Ba,Sr)CaCu2O7 superconductor on the AC susceptibility and electrical properties

Nur-Akasyah, J.; Ranjbar, Morteza; Abd‐Shukor, R.

doi:10.1016/j.ceramint.2021.08.078

Cited by 8 publications

(4 citation statements)

References 28 publications

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“…Regarding the valence state of elements, Tl 1+ /Tl 3+ , Cr 2+ /Cr 3+ /Cr 4+ /Cr 5+ /Cr 6+ , Se 4+ /Se 6+ , Ba 2+ , Sr 2+ , Ca 2+ , and Cu 2+ /Cu 3+ are the possible valence of the ions in the Tl 1−x X x (Ba,Sr)CaCu 2 O 7 superconductor with X = Cr and Se, respectively. Tl, Cr, and Se were found to favor a single valence state in the Tl-1212 phase with Tl 3+ [35], Cr 3+ [8,26], and Se 4+ [5,16,30]. Interestingly, the role of Cr in the Tl-1212 phase is highly distinctive and merits specific consideration.…”

Section: Electrical Resistancementioning

confidence: 97%

“…The decreasing trend of the c lattice parameter with the substitution of Cr, Bi, Pb, and Se as in Table 1 is possibly due to their smaller ionic radii being substituted at the Tl site. Considering the ionic radii of Cr, Bi, Pb, and Se for CN = 6 [24], where Cr 3+ = 0.615 Å [8,26], Bi 3+ = 1.03 Å [17,27], Pb 4+ = 0.775 Å [28,29], and Se 4+ = 0.50 Å [5,16,30], it is recommended that these elements were substituted for a larger Tl site (Tl 1+ = 1.50 Å and Tl 3+ = 0.885 Å). These results indicate that there is a significant correlation between the variation of the a and c lattice parameters with the effective ionic radius of the substituted elements (CN = 6) as mentioned in the previous study [30].…”

Section: Xrd Patternsmentioning

confidence: 99%

“…A transition metal (Ta) was also found to suppress T c of (Tl 1−x Ta x )(Ba,Sr)CaCu 2 O 7 [15]. There is also a study that identified the effects of non-metal (Se) and metalloid (Te) elements on the superconductivity of Tl 1−x M x (Ba,Sr)CaCu 2 O 7 (M = Se or Te) for x = 0-0.6 [16]. Se of a nonmetal element was reported to enhance the superconducting behavior of Tl(Ba,Sr)CaCu 2 O 7 in comparison to Te of a metalloid element.…”

Section: Introductionmentioning

confidence: 99%

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Elemental Substitution at Tl Site of Tl1−xXx(Ba, Sr)CaCu2O7 Superconductor with X = Cr, Bi, Pb, Se, and Te

2023

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The effects of elemental substitutions at the Tl site of a Tl1−xXx(Ba, Sr)CaCu2O7 superconductor with X = Cr, Bi, Pb, Se, and Te were investigated. This study aimed to determine the elements that enhance and suppress the superconducting transition temperature of the Tl1−xXx(Ba, Sr)CaCu2O7 (Tl-1212) phase. The selected elements belong to the groups of transition metal, post-transition metal, non-metal, and metalloid. The relationship between the transition temperature and ionic radius of the elements was also discussed. The samples were prepared by the solid-state reaction method. The XRD patterns showed a single Tl-1212 phase was formed in the non- and Cr-substituted (x = 0.15) samples. The Cr-substituted samples (x = 0.4) showed a plate-like structure with smaller voids. The highest superconducting transition temperatures (Tc onset, Tcχ′, and Tp) were also achieved by the Cr-substituted samples for x = 0.4 compositions. However, the substitution of Te suppressed the superconductivity of the Tl-1212 phase. Jc inter (Tp) for all samples was calculated to be in the range of 12–17 A/cm2. This work shows that substitution elements with a smaller ionic radius tend to be more favorable in improving the superconducting properties of the Tl-1212 phase.

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Section: Electrical Resistancementioning

confidence: 97%

Section: Xrd Patternsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Elemental Substitution at Tl Site of Tl1−xXx(Ba, Sr)CaCu2O7 Superconductor with X = Cr, Bi, Pb, Se, and Te

2023

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“…Tc was found to be around 92 to 97 K when Te was substituted in (Tl0.5Pb0.5)Sr2CaCu2O7 [16]. In Tl(Ba,Sr)CaCu2O7 superconductor, Te substitution at Tl site showed a decrease in transition temperatures and Tl-1212 phase formation as amount of Te increased [17]. Aside from that, the incorporation of Te in Ag-sheathed BSCCO (2223) tape has been reported [18].…”

Section: Introductionmentioning

confidence: 93%

AC Susceptibility and Superconducting Properties of Te-Substituted TlSr2Ca(Cu2-xTex)O7

Ilhamsyah,

Abd-Shukor,

Norazimah

et al. 2023

MSF

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The effect of Te substitution on TlSr2Ca(Cu2-xTex)O7 for x = 0.2, 0.3, 0.4, and 0.5 was investigated. The solid-state reaction approach was used to prepare the samples. All TlSr2Ca(Cu2-xTex)O7 samples exhibited the presence of major Tl-1212 and minor Tl-1201 phases. Further Te replacement promoted the formation of the Tl-1201 phase. All samples demonstrated metallic normal state characteristics before onset transition temperature, Tc-onset. The resistance versus temperature curve for all samples revealed that the Tc-onset was between 46 and 40 K and the zero-resistance temperature, Tc-zero was between 29 and 37 K. The measurement of AC susceptibility revealed a susceptibility superconducting transition Tc χ' ranging from 30 to 36 K. This study showed that Te substitution stabilized the Tl-1212 phase, enhanced Tc χ’ although the Tc-onset and Tc-zero were below the boiling point of liquid nitrogen.

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AC susceptibility and electrical properties of Cr and Mo substituted Tl(BaSr)CaCu2O7 Tl-1212 type phase superconductors

Muhammad-Najib,

Muhammad-Aizat,

Jumali

et al. 2023

Appl. Phys. A

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Influence of Se and Te substitutions at Tl-site of Tl(Ba,Sr)CaCu2O7 superconductor on the AC susceptibility and electrical properties

Cited by 8 publications

References 28 publications

Elemental Substitution at Tl Site of Tl1−xXx(Ba, Sr)CaCu2O7 Superconductor with X = Cr, Bi, Pb, Se, and Te

Elemental Substitution at Tl Site of Tl1−xXx(Ba, Sr)CaCu2O7 Superconductor with X = Cr, Bi, Pb, Se, and Te

AC Susceptibility and Superconducting Properties of Te-Substituted TlSr<sub>2</sub>Ca(Cu<sub>2-x</sub>Te<sub>x</sub>)O<sub>7</sub>

AC susceptibility and electrical properties of Cr and Mo substituted Tl(BaSr)CaCu2O7 Tl-1212 type phase superconductors

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